Sheet-piling.



J. F. JOHNSTON.

SHEET FILING.

APPLICATION FILED NOV. 1, 1910.

Patented May 30, 1911.

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.TOHN FRANKLIN JOHNSTON, OF BETHLEHEM, PENNSYLVANIA.

SHEET-Prune.

Specification of Letters Patent. Patented May 30, 1911.

Application flled November 1, 1910. Serial No. 590,179.

To all whom it may concern:

Be it known that I, J OI-IN FRANKLIN JOHNSTON, of Bethlehem, in thecounty of Northampton and in the State of Pennsylvania, have invented acertain new and useful Improvement in Sheet-Piling, and do herebydeclare that the following is a full, clear, and exact descriptionthereof.

My invention relates particularly to piling which may be put up insheetsor sections which interlock with one another so as to form a wall, forlevees, docks, coll'er dams, caissons and all similar work where apermanent or temporary wall is required.

Tn the forms of sheet piling which have been previously used, while thesections have been arranged in such a manner as to interlock with oneanother, it has been necessary when it was desired 'to build a wall inan angular position to provide special sections for this purpose to formthe apex of the angle. With my construction, on the other hand, it isnot necessary to provide any ad ditional special sections for thispurpose but the construction is such that any section can be located atan angle to the adjoining section with any desired degree of inclinationwithin an arc of 180 degrees, without in any way interfering with thelocking or tight fitting of the sections together. My con struction issuch, furthermore, as to cause the adjacent sections to be in intimatecontact with each other thereby forming' an effective seal to preventthe passage between the sections of any liquid or plasticmatcrials.

I have shown one form of my invention in the accompanying drawings inwhich Figure l is a top view of a section of sheet piling made inaccordance with my invention, and Fig. 2 is a top view of a wall ofsheet piling 'made up of sections such as those shown in Fig. 1.

Each-of the sections comprises a plate 1, of metal formed into a shapehaving a spiral 2 at each c'nd thereof, and as shown in the drawings.the sections to which I refer have the spirals located on the same sideof the plate of metal, although I do not in any Way consider thisposition of the spirals essential.

Many diil'erent forms of curves or spirals may be used upon the plates1, but in the drawings I have shown particularly an Archimedean spiral,the property of which is that the radius of the spiral increasesuniformly with the angle of the curve.

.As shown in Fig. 2, the joints'between the sections are such as toeffectively prevent seepage or the passage of any appreciable quantityof liquid or plastic materials be tween the sections. Furthermore, asshown in the same figure, the sections can be readily turned at an angleto one another within an arc of 180 degrees without in any mannerdestroying the tightness of the joint for preventing seepage or in anyway interfering with the effectiveness of the locking of the sections toone another. It will be seen, furthermore, that any ,one of the sectionsmay be turned to the right or to the left of an adjacent section so thatthe wall being erected by means of the sheet piling can be readilyturned to the right or to the left, as desired. Finally, it is not onlypossible to locate the different portions of the wall at an angle to oneanother, but the sections can be located in such a manner, if desired asto form a closed circular wall, a type oi wall which is of wide use inengineering operations.

While I have described my invention above in detail, I wish it to beunderstood that many changes may be made therein withoutdepnrting'fromthe spirit of my invention.

- I claim;

1. In aglevice of the character described, a section of sheet pilinghaving an Archimedean spiral at its edge.

2. In sheet piling, a plurality of interlocking sections adapted to berotated with regard to one another while retaining the same degree ofcontact.

In sheet piling, a plurality of interlocking sections adapted to berotated with regard to one another through an angle of at least 180degrees. I

4. In sheet piling, a plurality of interlocking sections adapted to berotated with regard to one another through an angle of at least 180degrees, without becoming un- In testimony that I claim the foregoing Ilo cskeil. h 1- 1 1 f i k have hereunto set my hand.

ns eet pi in 3a um it o inter'oc v ing sections adaptgd to be ro scmtedwith r- H FRANKLIN JOHNSTUN' 5 ard to one'another through an angle of atWitnesses:

east 180 degrees whiie retaining a-tight J. S. KRAUSE,. joint betweenthe sections. HOWARD L. LATZENGER.

